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To be sure, he would have to post the MBR of the original Hard Drive.
A new Drive as well as a GPT MBR is blank.
Simply partitioning a Drive without making it bootable might not initialize the MBR Code. Mine won't unless you tell it specifically to do so.

The four bytes at 0xDC in the MBR is a signature that Windows 9x writes when there are only zeroes between 0xDA and 0xE0. Windows has big problems when the checksum of two MBRs are identical so it adds a signature to new MBRs or if blank. It corrupted one of my Amiga Hard Drives by doing that.

I focus more on Windows 9x Applications.
NTFS TRIM Programs already existed.
I don't have enough documentation on NTFS to write one.
You can TRIM a NTFS Partition by Zero filling it and then use the Zero TRIM Mode in my Program.

Only 4Kn Internal Drives need Windows 7. These are normally used only in servers.
512e Drives require proper partitioning or formatting to be used efficiently but run just fine in XP.
512n is the format used by older Drives and does not require any special considerations.